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(No Model.)

J. L. GROSS BUFFING PAD. v N0. 290;631. Patented Dec. '18, 1883 #5 e wzflvzsszs jivmjvfojz A r M,

V i t It! Miran ATENT OFFICE.

JOHN L. CROSS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO ALBERT L. GROSS, OF SAME PLACE.

BUFFING-PAD.

SPECIFICATION forming part of Letters Patent No. 290,631, dated December 18, 1883.

Application filed April 27, 1883. (No model.)

.To all whom it may concern.-

Bn it known that I, JOHN L. Onoss, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Buffing Pads, of

which the following is a specification.

My invention relates to an improvement in that class of buffing-pads in which sand-paper is applied for buffing, grinding, or polishing purposes; and the object of my improvement, which is fully described hereinafter, is to afford facilities for the ready renewal of the buffingsurface and for the application of clamping devices,whereby sand-paper may be retained on the disk without interfering with the buffing-surface.

In the accompanying drawings, Figure l is a sectional View of my improved buffing-pad; Fig. 2, a face View; Fig. 3, a perspective view; Fig. 4, a section 011 the line 1 2; Fig. 5, aperspective view of the clamp which I prefer to use in connection with the pad; Fig. (i, a view of a modified form of clamp.

The rotary pad is intended,mainly, for buffing the soles of boots and shoes near the heel, and consists of a disk, preferably made of wood, and having a convex face in which are a number of radial depressions, b-four in the present instancethe disk being secured to a central hub, a, constructed for attachment to a spindle, to which a rotary motion may be imparted by any suitable appliances. The disk is in the present example concave'at the back, where there areprotuberances orribs corresponding with the depressions in front; but the disk may be made solid, providing there are depressions in the face, without departing from my invention, and the hub may, if desired, form part of the disk instead of being attached thereto. The character of the depressions b will be best understood by reference to the perspective view, Fig. 3, and sectional view, Fig. 4, each depression being deepest near the edge of the disk, and grad- 5 ually merging into the face near the center.

A circular piece, 6, of sand or emery paper is applied to the disk and forced into the depressions, where it is held by clamps. These clamps serve to crimp the sand-paper or draw 50 it down into the depressions and cause it to bear firmly on the ribs between the same, this crimping of the sand-paper being facilitated by the gradually-increasing depth of the depressions, and also by a gradual increase in the width of the same from center to circumference 5 5 of the pad, as shown in Figs. 1, 2, and 3.

- W'hile clamps of different styles may be used, I prefer to make them in the manner shown in Fig. 5, in which a clamping-lever,

D, is pivoted to astud, E, secured to the back of the disk wherever one of the depressions occurs, the hooked arm d of the lever overlapping the said paper e, and a spring, f, attached to the stud bearing against the straight arm andcausing the said hooked arm to bear against the sandpaper, and thus confine the latter firmly to the disk. Only that part of the sand-paper which bears against the ribs formed by the depressions in the face of the disk bears against the object to be buffed, and when these parts of the sand-paper have lost their buffing efficiency by long use the said paper may be readily detached and so readjusted to the disk that the portion of the paper which had previously been in the depressions may be against the ribs of the disk, and there will consequently'be a renewed buffing-surface; or the paper may be so adjusted from time to time that a portion only of its unworn surface will bear on the ribs.

For some uses the disk may have a flat facewith depressions; but where the disk is used for buffing the soles of boots or shoes it is preferable to adopt the convex face. The depressions, in addition to the facilities which 8 5 they afford for the ready and economical renewing of the buffing surface, permit the clamping devices to be placed away from and entirely clear of the buffing surface, and also bring said clamps within the periphery of 0 the disk-that is to say, within a dotted line, 00, Fig. 2, forming a continuation of the outer edges of the buffing portions of the diskso that the pad can work up close to the edge of the heel.

The clamps may consists of simple springclips, as shown in Fig. 6; but I prefer to pivot them permanently to the disk, as shown in Fig. 5.

I am aware that sand-paper has been secured I00 2 menu to disks by means of clamps located in concentric grooves in the disk, and I do not therefore claim, broadly, the combination of clamps with a grooved or recessed disk; but

I claim as my invention 1. The combination of the buffing wheel or disk A, having radial depressions b, with devices for clamping sand or emery paper to the face of the disk where the depressions occur, as set forth.

2. The combination of the buffing wheel or disk A, having a convex face with radial depressions b, with devices for clamping sand or emery paper to the face of the disk where the depressions occur, as set forth.

3. The combination of the buffing wheel or disk A, having radial depressions b, increasing in depth from center to circumference of the disk, with devices for clamping sand or emery paper to the face of the disk where the depressions occur, as set forth.

4. The combination of the buffing wheel or disk A, having radial depressions b, increasing in width and depth from the center to the circumference of the disk, with devices for clamping sand or emery paper to the face of the disk where the depressions occur, as set forth.

5. The combination of the buffing-wheel or disk having radial depressions b, with devices for clamping sand or emery paper to the face of the disk where the depressions occur, said devices being within the peripheral line ofthe buffing portions of the disk, as set forth.

6. The combination of the buffing wheel or disk having depressions b, with the spring-1cver D, pivoted to the disk where each depression occurs, and having ahooked arm,d,overlapping the disk, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN L. GROSS. 

